refactor: rename the remaining Lamassu-branded identifiers

LamassuEventKind → BitSpireEventKind (nostr-client; no consumers outside
the package), the kiosk theme localStorage keys lamassu-theme /
lamassu-color-mode → bitspire-* (a one-time theme reset on existing
kiosks), the ui-shared UMD global LamassuUIShared → BitSpireUIShared, and
the orphaned Rust HAL's Cargo name/description/repository plus its lib.rs
header — now also labelled as the unbuilt leftover it is.

nostr-client: 43/43 tests, tsc clean. Machine app: vue-tsc + electron tsc clean.

packages/ui-shared/vite.config.ts

@@ -7,7 +7,7 @@ export default defineConfig({
   build: {
     lib: {
       entry: resolve(__dirname, 'src/index.ts'),
-      name: 'LamassuUIShared',
+      name: 'BitSpireUIShared',
       fileName: 'index',
     },
     rollupOptions: {